What are Implicit ARIA Roles?

For a while now, I’ve been seeing mentions of implicit ARIA roles as something web designers and developers should be aware of and know how to use. In the case of ARIA roles, the word implicit means that the browser interprets certain HTML elements semantically and treats them as if an ARIA role were assigned to them. In these situations, the web designer does not specifically need to add the role attribute to the element. . . .